Finding the Fourth Proportional to 30,836.39, 42,554.31 and 16,689.23

Step by Step Solution

1. Step 1: Write the proportion equation
   30,836.39 : 42,554.31 = 16,689.23 : x
2. Step 2: Convert to fraction form
   30,836.39/42,554.31 = 16,689.23/x
3. Step 3: Cross multiply
   30,836.39x = 42,554.31 × 16,689.23
4. Step 4: Simplify right side
   30,836.39x = 710,198,454.31
5. Step 5: Solve for x
   x = 710,198,454.31/30,836.39
6. Step 6: Final answer
   x = 23,031.18